@article{199, keywords = {Catechol oxidase, Epinephrine, Functional model, Kinetic studies, Kinetic study, Kinetic theory, Kinetics, Manganese, Manganese complexes, Manganese(II) complex, Oxidation, Reaction kinetics}, author = {Imola Szigyártó and L. Szabó and L.I. Simándi}, title = {Kinetic studies on the manganese(II) complex catalyzed oxidation of epinephrine}, abstract = {The manganese complex [Mn2(HL)2](BPh 4)2 was found to be a selective catalyst for the oxidation of epinephrine (a catecholamine derivative) to adrenochrome at room temperature in sodium carbonate-bicarbonate buffer. The epinephrine auto-oxidation rate significantly increases upon the addition of manganese complex. The kinetics of reaction was studied by spectrophotometric method, monitoring the increase in concentration of adrenochrome product. According to the proposed mechanism, O2 binding to the manganese complex is followed by the formation of a ternary catalyst-dioxygen-substrate complex as active intermediate, which decomposes in a rate-determining step, generating the adrenochrome. © 2013 Elsevier B.V.}, year = {2013}, journal = {Journal of Molecular Catalysis A: Chemical}, volume = {372}, pages = {66-71}, month = {2013}, isbn = {13811169 (ISSN)}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84875717007&partnerID=40&md5=78c3330bf9784da4c1adf34986e3c2bb}, note = {Cited By :3Export Date: 8 April 2016CODEN: JMCCFCorrespondence Address: Szigyártó, I.C.; Research Centre for Natural Sciences, Hungarian Academy of Sciences, Institute of Molecular Pharmacology, Department of Biological Nanochemistry, Pusztaszeri Street 59-67, 1025 Budapest, Hungary; email: szigyarto.imola.csilla@ttk.mta.huReferences: Que Jr., L., (1999) Bioinorganic Catalysis, pp. 269-321. , J. Reedijk, E. Bouwman, 2nd ed. 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